I have been seeing rainbow halos after i had put some chemicals in the eyes 8 yrs back, doct says nothing wrong. Gave me just tears e/d. Will it heal?

In brief:
Rainbow haloes

Based on your history, the issue is not likely going to resolve.

It may be related to corneal scarring and irregularity related to prior chemical exposure. I would continue the artificial tears and consider getting a rigid gas permeable contact lens fit to eliminate any possible corneal irregularity. See an eye doctor for this consideration.

In brief:
Rainbow haloes

Based on your history, the issue is not likely going to resolve.

It may be related to corneal scarring and irregularity related to prior chemical exposure. I would continue the artificial tears and consider getting a rigid gas permeable contact lens fit to eliminate any possible corneal irregularity. See an eye doctor for this consideration.
Would you like to video or text chat with me?

In brief:
Hard to tell

An examination by an eye md should have discovered any scars on your corneas.

Dryness, refractive errors and cataracts can all cause halos around lights. Unfortunately, you have not indicated that these conditions have been eliminated. Are your symptoms worse at night? Contact him again and ask for a reassessment. Even a mild amount of refractive error can be very symptomatic.

In brief:
Hard to tell

An examination by an eye md should have discovered any scars on your corneas.

Dryness, refractive errors and cataracts can all cause halos around lights. Unfortunately, you have not indicated that these conditions have been eliminated. Are your symptoms worse at night? Contact him again and ask for a reassessment. Even a mild amount of refractive error can be very symptomatic.
Would you like to video or text chat with me?